Final answer:
The pH value for the sanitizing solution is 8.13, indicating that it is basic in nature. The correct answer is C.8.13.
Step-by-step explanation:
The pH value for a sanitizing solution with a [H₃O⁺] = 7.4 × 10⁻⁹m H₃O⁺ is 8.13.
The pH is calculated using the formula pH = -log [H₃O⁺]. Plugging in the value, we get pH = -log (7.4 × 10⁻⁹) = 8.13.
Based on the pH value, the sanitizing solution is basic because its pH value is greater than 7.00, which indicates a basic solution.
The pH value for a sanitizing solution can vary depending on the specific sanitizer and its formulation. However, many sanitizing solutions used in various industries and households typically have pH values within specific ranges to ensure effectiveness and safety.
Acidic Sanitizers: Some sanitizers, like those based on acids (such as citric acid or acetic acid), can have lower pH values, often ranging from around 2 to 4. These solutions create an acidic environment that inhibits the growth of microorganisms.
Alkaline Sanitizers: Other sanitizers, like those containing alkaline compounds (such as quaternary ammonium compounds or sodium hypochlorite), may have higher pH values, usually ranging from 8 to 12. These solutions work effectively against microbes by disrupting their cell structures or functions.